2Apple ProRes RAWApril 2018ContentsIntroduction 3About Raw Video 4Data Rate 6Performance 8Using ProRes RAW in Final Cut Pro 12Using Log Conversion with Built-in Camera LUTs 13Using Log Conversion with Custom LUT Effects 17Grading Directly Without LUTs 19Conclusion 20
3Apple ProRes RAWApril 2018IntroductionIn 2007, Apple introduced the Apple ProRes codec family, providing an unparalleled combination of real-time, multistream editing performance, impressive image-quality preservation, and reduced storage rates for high-bit-depth 4:2:2 and 4:4:4:4 video.Apple ProRes RAW is based on the same principles and underlying technology as existing ProRes codecs, but is applied to a camera sensor’s pristine raw image data rather than conventional image pixels. ProRes RAW brings to raw video the same great performance, quality, and ease of use that ProRes has brought to conventional video, in a format ideal for high-dynamic-range (HDR) content creation in Final Cut Pro X.
4Apple ProRes RAWApril 2018Digital camera sensors consist of an array of millions of light-sensitive elements called photositesthat convert the light exposed to the sensor to an array of digital intensity values. To capture color, most current digital cameras use a color filter array that yields a single primary color value (such as red, green, or blue) at each photosite location. This color filter arrangement is known as a Bayer pattern, where each two-by-two group of photosites consists of one red, one blue, and two green sensor elements. In contrast, conventional RGB images consist of not one but three primary color values (red, green, and blue) at each pixel location.RGRGRGRGGBGBGBGBRGRGRGRGGBGBGBGBRGRGRGRGGBGBGBGBRGRGRGRGGBGBGBGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBBayer patternConventional RGBAbout Raw Video
5Apple ProRes RAWApril 2018About Raw VideoThe process of converting a Bayer pattern image to a conventional RGB image is known as demosaicing. For conventional video, demosaicing and other processing operations are performed within the camera to produce viewable RGB images that can be recorded into a video file.RGRGGBGBRGRGGBGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBRGBBayer imageRGB imageConventionalvideo fileDemosaicandprocessIn cameraAt playback time, an application needs only to decode the conventional video file to produce RGB images that can be edited and displayed. The demosaicing and processing have already been performed by the camera at capture time and are “burned in.”